Pemphigus p-fremontii-midrib-gall

The inducer of this gall is unknown or undescribed.
Family: Aphididae | Genus: Pemphigus
Detachable: integral
Color: yellow, green
Texture: hairless
Shape: globular
Season: Summer, Spring
Alignment: integral
Walls: slit
Location: lower leaf, leaf midrib
Possible Range:i
Common Name(s):
missing image of Pemphigus p-fremontii-midrib-gall

Plant Galls of the Western United States

Pemphigus sp. B
Midrib-gall aphid
[Page 64]

Hosts: Populus fremontii

This aphid induces large, globular galls that protrude from the ventral midrib of Fremont cottonwood leaves.

- Russo, Ronald A. : (2021) Plant Galls of the Western United States©

Further Information:

See Also:
Unless noted otherwise in the ID Notes, observations of this gall are collected in the Observation Field Gallformers Code with value p-fremontii-midrib-gall on iNaturalist. You can view them here:
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